Floor planer



M y 1929. A. FLETCHER ET AL FLOOR PLANER Filed June 29, 192'? 2 SheetsrSheet 1 alibo'zmu May: 21, 1929.

l A. FLETCHER ET AL FLOOR PLANER 2 Sheets-Sheet 2 Filed June 29, 1927 gwuehtoq,

6f. [leioiwk 35 E BEye/rzlzm e zd.%

Patented May 21, 1929.

rrEn smres PATENT OFFICE.

ALBERT FLETCHER AND nmiunrr B. EVERNHAM, or asnuny raamnnw JERSEY.

:rroora PLANER.

Application filed June 29,

This invention relates to new and useful improvements in planers, and particularly to planers for planing floors, or the like flat surfaces.

One object of the invention is to provide a planer which includes a plurality of rotary planing elements, or cutters, and wherein the cutters travel orbitally.

Another object is to provide a planer of this character wherein the rotary cutters rotate at a greater speed, about their own axes, than they rotate orbitally about a central axis.

Another object is to provide a device of this character wherein a single motor is employed to rotate the cutters, and wherein the rotary action ofthe cutters, in their contact with the floor, cause the orbital motion of the cutters, and their support.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawings.

In the drawings:

Figure 1 is a side elevation of a planer, made in accordance with the present invention, portions being broken away to expose the gears and the cutters.

Figure 2 is a bottom plan view of the planer.

Figure 3 is a vertical sectional view on the line 33 of Figure 2, through the vertical driver shafts.

Referring particularly to the accompanying drawing, 10 represents a suitable platform, having the supporting wheels 11, on the rear end thereof, and said platform supporting the electric motor 12. The shaft 13, of the motor is provided with a bevel gear 14;, to which reference will be made later herein. Disposed vertically through the platform, in advance of the motor, is a hollow shaft 15, suitable braces extending from said shaft to the lower side of the platform, whereby to hold the shaft rigidly in position. The shaft 15 extends downwardly to a point a short distance above the floor, and has secured to said lower end the large horizontal bevel gear 16. Rotatable in the shaft 15, and projecting a short distance below the lower end thereof, is a solid shaft 17, a bevel gear 18 being secured to the upper end thereof, and meshing with the motor gear 1 and a bevel gear 1927. Serial No. 202,296. h

19, on its lower end, of a size equal to the gear 16. Disposed between, and meshing with the gears 16 and 19, are the smaller vertical bevel gears 20, said gears being arranged at equally spaced the gears 16 and 19.

Disposed beneath the platform, in surrounding relation to the gears, and concentrio to the vertical shaft, is a cylindrical shell 21, a depending flange 22, carried by the lower side of the platform, being arranged inwardly of the upper edge of the shell whereby to maintain the same in proper position. Ball bearings 23 are carried by the upper edge of the shell, which bear against the platform, as shown. The lower edge of the shell is also provided with similar ball bearings 24, which are adapted to engage the floor being planed. In the lower portion of the shell there .are formed the openings 25, of a number equal to the number of cutters, and each of the openings contains a bushing 26, within which is rotatably disposed the adjacent pintle 27, of a cutter. The other pintle 28, of each cutter forms the shaft of one of the gears 20. A suitable handle 29 is fixed to the rear end of the platform, by means of which the machine is pushed over the floor to be planed.

The gears 16 and 19 are provided with twice the number of teeth as are the gears 20, whereby to cause the cutters to rotate at twice the speed as that of the shell. As the motor drives the shaft 17, its gear 16 will rotate the gears 20, and as the gear 19 is held stationary, the gears 20 will roll around on said gear, whereby to move the cutters orbitally, .such movement carrying the shell around with them. The rotary movement of the shell is thus in the opposite direction to the axial rotation of the cutters, and in view of the fact that the cutters rotate at a speed twice as action, upon the surface of the floor is produced.

What is claimed is:

A floor planing machine comprising a plat form having one end supported by wheels, a vertically disposed drum rotatably mounted on the lower face of the other end of the platform, a vertical hollow shaft rotatably supported by the platform and extending centrally into the drum, a shaft rotatably disdistances around great as that of the shell, a cutting posed within the hollow shaft, a gear fixed portion of the hollow shaft engaging with on the lower end of the second shaft, a block the gears of the cutters, and means on the 1 0 fixed on the lower end of the hollow shaft, platform in driving relation to the inner of radially arranged rotatable cutting elements the' vertieal shafts. f 7

having their ends j'ournaled respectively in a In testimony whereof, we have affixed our the block and the wall of the drum, gears signatures. r V

on the inner ends of the cuttersengaged with ALBERT FLETCHERV r the firstnamed gear, a gear on the lower 7V EMHETT B. EVERNHAM. 

